request build on just one arch ?

Hi, I receive a build result message: 696 (audacity-freeworld): Build on target fedora-8-rpmfusion_free succeeded. Build logs may be found at http://buildsys.rpmfusion.org/logs/fedora-8-rpmfusion_free/696-audacity-f... I notice a build did not complete {nor inform failure} for f8 on ppc64: http://buildsys.rpmfusion.org/plague-results/fedora-8-rpmfusion_free/auda... I didn't receive a build failed message, so perhaps this job went awol, or the results/rpm did not copy back to the web server ? If that is the case, is there a way to request a build for just one branch on one arch ? DavidT.